Additive Thinking and Mental Strategies · Operations and Algebra

Flexible Mental Math Strategies

Moving beyond counting on fingers to using doubling, making tens, and compensation.

Key Questions

  1. 1Which mental strategy is most efficient for adding numbers that are close to a ten?
  2. 2How does decomposing a number into smaller parts make it easier to subtract?
  3. 3Why might two people use different strategies to solve the same calculation correctly?

Ontario Curriculum Expectations

ON: Number - Grade 2
Grade: Grade 2
Subject: Mathematics
Unit: Additive Thinking and Mental Strategies
Period: Operations and Algebra

Suggested Methodologies

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